In no particular order:
Honda Pilot, because every driver is hell on wheels and almost without fail does something dumb.
Ricers of any variety (Honda Civic's, Dodge Neon's, Chevy Cavalier's, and the occasional Subaru Impreza).
Chevy Camaro, new model. Hate, hate that car. The trim is woeful, the view from inside (and outside) is abysmal, the drivers generally are idiots. There's literally nothing I like about that car.
In fact, pretty much any late model Chevy trucks. Again, same woeful trim that drives me nuts. And any Chevy car, except possibly the C6 Corvette. You wouldn't catch me dead in a new Cruze (unless the transmission grenaded itself out and got me killed).
Except the Corvette C7. I love everything about it, except the woeful tail lights, which look like they were stolen off a base model Camaro. I'm pretty sure the same guy that designed the Pontiac Aztek designed the C7, which would explain a lot of things.
The new Buick Regal is an insult to the Regal's legacy. No Regal deserves a four cylinder, I don't care if it makes a thousand horsepower.
The Buick Verano is a rebadged Chevy Cruze. Nuff said.
In fact, it upsets me that Buick offers zero full size cars today.